di ketahui lingkaranadalah 2464cm2 maka kelilingya adalah

Mapel Math
Bab bangun datar

Pembahasan :
Jari jari lingkaran
[tex] = \sqrt[2]{ \frac{keliling}{\pi} } = \sqrt[2]{ \frac{2464 \: {cm}^{2} }{ \frac{22}{7} } } \\ = \sqrt[2]{ \frac{7 \times 2464}{22} } = \sqrt[2]{ \frac{17248}{22} } = \sqrt[2]{784}
= 28 \: cm[/tex]

Keliling lingkaran
[tex] = \pi \times d \\ = \frac{22}{7} \times 56 \\ = 176 \: {cm}^{2} [/tex]

Good Luck ^^

cari dulu jari2nya
[tex]l = \pi {r}^{2} \\ 2464 {cm}^{2} = \pi {r}^{2} \\ r = \sqrt{2464 \div \frac{22}{7} } \\ r = \sqrt{2464 \times \frac{7}{22} } \\ r = 28[/tex]
[tex]k = 2\pi \:r \\ = 2 \times \frac{22}{7} \times 28 \\ = 176cm[/tex]
maaf kalau salah